chore: rename quicproquo → quicprochat in docs, Docker, CI, and packaging

Rename all project references from quicproquo/qpq to quicprochat/qpc
across documentation, Docker configuration, CI workflows, packaging
scripts, operational configs, and build tooling.

- Docker: crate paths, binary names, user/group, data dirs, env vars
- CI: workflow crate references, binary names, artifact names
- Docs: all markdown files under docs/, SDK READMEs, book.toml
- Packaging: OpenWrt Makefile, init script, UCI config (file renames)
- Scripts: justfile, dev-shell, screenshot, cross-compile, ai_team
- Operations: Prometheus config, alert rules, Grafana dashboard
- Config: .env.example (QPQ_* → QPC_*), CODEOWNERS paths
- Top-level: README, CONTRIBUTING, ROADMAP, CLAUDE.md

docs/sdk/go.md

@@ -7,7 +7,7 @@ Location: `sdks/go/`
 ## Installation
 
 ```sh
-go get quicproquo.dev/sdk/go
+go get quicprochat.dev/sdk/go
 ```
 
 ## Quick Start
@@ -18,13 +18,13 @@ package main
 import (
     "context"
     "fmt"
-    "quicproquo.dev/sdk/go/qpq"
+    "quicprochat.dev/sdk/go/qpc"
 )
 
 func main() {
     ctx := context.Background()
 
-    client, err := qpq.Connect(ctx, qpq.Options{
+    client, err := qpc.Connect(ctx, qpc.Options{
         Addr:               "127.0.0.1:5001",
         InsecureSkipVerify: true, // dev only
     })
@@ -63,7 +63,7 @@ func main() {
 
 | Method | Description |
 |---|---|
-| `qpq.Connect(ctx, opts)` | Connect to server |
+| `qpc.Connect(ctx, opts)` | Connect to server |
 | `client.Close()` | Disconnect |
 | `client.Health(ctx)` | Health check |
 | `client.SetSessionToken(token)` | Set pre-existing token |
@@ -81,7 +81,7 @@ func main() {
 
 ## Structure
 
-- `qpq/` -- High-level client API
+- `qpc/` -- High-level client API
 - `transport/` -- QUIC + TLS 1.3 transport, Cap'n Proto RPC framing
 - `proto/node/` -- Generated Cap'n Proto Go types
 - `cmd/example/` -- Example usage